express.session.MemoryStore没有返回会话吗？
express.session.MemoryStore没有返回会话吗？
提问于 2013-08-19 02:12:09
在PHP中设置会话和使用会话非常容易。但是我的网站需要处理WebSockets。我在node.js中设置会话时遇到了问题。我可以在不使用会话的情况下轻松地推送数据，这将很好地工作，但是当打开多个选项卡时，会创建新的socket.id，并且以前打开的选项卡不能正常工作。所以我一直在处理会话，在访问会话存储时遇到了问题，它的日志会话没有被抓取。我也尝试过session.load，但没有成功
如何获取session对象并以这样的方式使用它:打开其他选项卡不会影响功能，并在所有选项卡上将数据从服务器推送到客户端？
var express=require('express');
var http = require('http');
var io = require('socket.io');
var cookie = require("cookie");
var connect = require("connect"),
MemoryStore = express.session.MemoryStore,
sessionStore = new MemoryStore();
var app = express();
app.configure(function () {
app.use(express.cookieParser());
app.use(express.session({store: sessionStore
, secret: 'secret'
, key: 'express.sid'}));
app.use(function (req, res) {
res.end('<h2>Hello, your session id is ' + req.sessionID + '</h2>');
});
});
server = http.createServer(app);
server.listen(3000);
sio = io.listen(server);
var Session = require('connect').middleware.session.Session;
sio.set('authorization', function (data, accept) {
// check if there's a cookie header
if (data.headers.cookie) {
// if there is, parse the cookie
data.cookie = connect.utils.parseSignedCookies(cookie.parse(data.headers.cookie),'secret');
// note that you will need to use the same key to grad the
// session id, as you specified in the Express setup.
data.sessionID = data.cookie['express.sid'];
sessionStore.get(data.sessionID, function (err, session) {
if (err || !session) {
// if we cannot grab a session, turn down the connection
console.log("session not grabbed");
accept('Error', false);
} else {
// save the session data and accept the connection
console.log("session grabbed");
data.session = session;
accept(null, true);
}
});
} else {
// if there isn't, turn down the connection with a message
// and leave the function.
return accept('No cookie transmitted.', false);
}
// accept the incoming connection
accept(null, true);
});
sio.sockets.on('connection', function (socket) {
console.log('A socket with sessionID ' + socket.handshake.sessionID
+ ' connected!');
});回答 1
Stack Overflow用户
发布于 2013-12-21 00:32:15
请看这篇文章：Session-based Authorization with Socket.IO
您的代码运行良好，但需要两处改进才能完成您想要的工作(从服务器向客户端发送会话数据)：
- 它在授权期间提取
sessionIDonly - 它在连接期间由此
sessionID从存储区提取会话数据，您可以在一段时间间隔内将数据从服务器发送到客户端。
下面是改进后的代码：
var express = require('express');
var connect = require('connect');
var cookie = require('cookie');
var sessionStore = new express.session.MemoryStore();
var app = express();
app.use(express.logger('dev'));
app.use(express.cookieParser());
app.use(express.session({store: sessionStore, secret: "secret", key: 'express.sid'}));
// web page
app.use(express.static('public'));
app.get('/', function(req, res) {
var body = '';
if (req.session.views) {
++req.session.views;
} else {
req.session.views = 1;
body += '<p>First time visiting? view this page in several browsers :)</p>';
}
res.send(body + '<p>viewed <strong>' + req.session.views + '</strong> times.</p>');
});
var sio = require('socket.io').listen(app.listen(3000));
sio.set('authorization', function (data, accept) {
// check if there's a cookie header
if (data.headers.cookie) {
// if there is, parse the cookie
var rawCookies = cookie.parse(data.headers.cookie);
data.sessionID = connect.utils.parseSignedCookie(rawCookies['express.sid'],'secret');
// it checks if the session id is unsigned successfully
if (data.sessionID == rawCookies['express.sid']) {
accept('cookie is invalid', false);
}
} else {
// if there isn't, turn down the connection with a message
// and leave the function.
return accept('No cookie transmitted.', false);
}
// accept the incoming connection
accept(null, true);
});
sio.sockets.on('connection', function (socket) {
//console.log(socket);
console.log('A socket with sessionID ' + socket.handshake.sessionID + ' connected!');
// it sets data every 5 seconds
var handle = setInterval(function() {
sessionStore.get(socket.handshake.sessionID, function (err, data) {
if (err || !data) {
console.log('no session data yet');
} else {
socket.emit('views', data);
}
});
}, 5000);
socket.on('disconnect', function() {
clearInterval(handle);
});
});然后，您可以在http://localhost:3000/client.html的public/client.html下创建一个客户端页面，以查看从http://localhost:3000填充的会话数据
<html>
<head>
<script src="/socket.io/socket.io.js" type="text/javascript"></script>
<script type="text/javascript">
tick = io.connect('http://localhost:3000/');
tick.on('data', function (data) {
console.log(data);
});
tick.on('views', function (data) {
document.getElementById('views').innerText = data.views;
});
tick.on('error', function (reason){
console.error('Unable to connect Socket.IO', reason);
});
tick.on('connect', function (){
console.info('successfully established a working and authorized connection');
});
</script>
</head>
<body>
Open the browser console to see tick-tocks!
<p>This session is viewed <b><span id="views"></span></b> times.</p>
</body>
页面原文内容由Stack Overflow提供。腾讯云小微IT领域专用引擎提供翻译支持
原文链接：
https://stackoverflow.com/questions/18302242
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